<template>
  <div class="list" ref="wrapper">
    <div>
      <div class="area">
        <div class="title border-topbottom">当前城市</div>
        <div class="button-list">
          <div class="button-wrapper">
            <div class="button">{{this.$store.state.city}}</div>
          </div>
        </div>
      </div>
      <div class="area">
        <div class="title border-topbottom">热门城市</div>
        <div class="button-list">
          <div class="button-wrapper"
               v-for="item of hot"
               :key="item.id"
               @click="handleItemClick(item.name)">
            <div class="button">{{item.name}}</div>
          </div>

        </div>
      </div>
      <div class="area" v-for="(item,key) of cities" :key="key" :ref="key">
        <div class="title border-topbottom">{{key}}</div>
        <div class="item-list">
          <div
            class="item border-bottom"
            v-for="innerItem of item"
            :key="innerItem.id"
            @click="handleItemClick(innerItem.name)">
            {{innerItem.name}}
          </div>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
  import Bscroll from 'better-scroll'

  export default {
    name: 'List',
    props: {
      hot: Array,
      cities: Object
      , letter: String
    },
    methods: {
      handleItemClick: function (city) {
        //方式一
        //this.$store.dispatch('changeCity',city);
        //方式二
        this.$store.commit('changeCity', city);
        this.$router.push('/');//跳转到首页
      }
    },
    mounted () {
      this.scroll = new Bscroll(this.$refs.wrapper)
    },
    //监听器
    watch: {
      letter () {
        if (this.letter) {
          const element = this.$refs[this.letter][0]
          this.scroll.scrollToElement(element)
        }
      }
    }
  }
</script>

<style scoped lang="stylus">
  .border-topbottom
    &:before
      border-color #ccc

    &:after
      border-color #ccc

  .border-bottom
    &:before
      border-color #ccc

  .list
    position absolute
    overflow hidden
    top 1.58rem
    left 0
    right 0
    bottom 0

    .title
      line-height .54rem
      background #eee
      padding-left .2rem
      color #666666
      font-size .26rem

    .button-list
      overflow hidden
      padding .1rem .6rem .1rem .1rem

      .button-wrapper
        width 33.33%
        float left

        .button
          text-align center
          margin .1rem
          padding .1rem 0
          border .02rem solid #ccc
          border-radius .03rem

    .item-list
      .item
        line-height .76rem
        padding-left .2rem

</style>
